Vat Blue VB(TDS)

Application and parameters of Vat Blue VB

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Vat Blue VB

Vat Dark Blue VB

Vat Blue VB Physical and Chemical properties

Dyeing depth g/L


Dyeing method


Leuco color


Leveling property


Dead cotton

Light (Xenon test 1/12)


Light (Xenon test 1/1)


Light (Xenon test 2/1)


Application Features


Dyeing method 

Dyeing Temperature(℃)

Reduction method

Reduction temperature (℃)

Leveling property

Other properties

Most suitable for method A, also aviable for method B 


Dyr cylinder, Full bath



The dye is sensitive to high temperature



Colour Fastness Test


Light Fastness





Bleaching resistant


Standard depth



Orginal color changed 

White fabric stained 

Orginal color changed 

White fabric stained 






Chlorine bleaching

Oxygen Bleaching

Orginal color changed 

White fabric stained 











Vat Blue VB has a dark blue powder. It is insoluble in water, and the leuco body formed by the dye in the alkaline powder solution is blue.

It is a domestic compound dye blended, mainly to solve the problem of flamala blue red, instead of the blue salt VB dye. The blending ratio varies according to the intensity of the dye itself and the requirements for the blue color. under:

Vat blue RSN (50%) 46.7%

Vat dark blue BO (50%) 39.6%

Vat olive green B (50%) 13.7%



Vat Blue VB Application:

Mainly used for silk dyeing, levelness and affinity are good. Used to stick/cotton blended fabric cold dyeing, uniform color. Also can be used for polyester/cotton two bath dyeing. Can also be processed into organic pigment.

Vat Blue VB  Use condition:

1.For cotton product dyeing or dip dyeing, it is suitable to use the method of A or B. It can be reduced by whole bath or reduced by dry cylinder, the reduction temperature is 60 °C, and the dyeing temperature is 50~60 °C.

2. leuco body has higher affinity to cotton fiber, uniform dyeing and faster dyeing rate. In order to avoid uneven dyeing, the temperature should not be too high when the initial dyeing, and add appropriate amount of bone glue as retarder. In addition, the reduced dark blue BO in the dye is sensitive to heat, so the temperature should be avoided when drying. It is mainly used for the suspension padding of cotton fabrics and polyester-cotton blended fabrics.

3.Vat blue VB (Vat dark blue VB) is generally not used for printing.

4. It can be used for the dyeing of cotton blend fabrics, as well as for the dyeing of viscose fibers.


1. Sometimes due to the lack of purity of the Vat blue RSN, the dark blue BO has poor heat resistance, unstable color shade or “wind print.” After the “wind print” is produced, 1 g/L of the insurance powder can be padded for repair.

2. When used for dyeing cotton yarns, it should be avoided on color fabrics that require chlorine bleaching or mercerizing to prevent color change.

3.It should be stored in a dry, ventilated place to avoid moisture.


20 or 25kg/compound bag, carton box, iron drum, fiber durm for powder dye and 1000kg/tank for liquid dye

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You can learn about other products:
Vat Blue 20
Vat Red 41
Vat Red 29
Vat Yellow 2
Vat Yellow 1

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